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Fine-Grained DRAM: Energy-Efficient DRAM for Extreme ...
Fine-Grained DRAM: Energy-Efficient DRAM for ExtremeBandwidth SystemsMike O Connor Niladrish Chatterjee Donghyuk Lee John Wilson Aditya Agrawal Stephen W. Keckler William J. Dally NVIDIA The University of Texas at Austin Stanford University{moconnor, nchatterjee, donghyukl, jowilson, adityaa, skeckler, bdally} GPUs and other high-performance throughput processors willrequire multiple TB/s of bandwidth to DRAM. Satisfying this band-width demand within an acceptable energy budget is a challengein these Extreme bandwidth memory systems. We propose a newhigh-bandwidth DRAM architecture, Fine-Grained DRAM (FGDRAM),which improves bandwidth by 4 and improves the energy efficiencyof DRAM by 2 relative to the highest-bandwidth, most Energy-Efficient contemporary DRAM, High Bandwidth Memory (HBM2).These benefits are in large measure achieved by partitioning the DRAMdie into many independent units, called grains, each of which has alocal, adjacent I/O.
Fine-Grained DRAM MICRO-50, October 14–18, 2017, Cambridge, MA, USA 1 Fk Fl row activation Fm Fn data transfer within a chip data transfer within a stack
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